61656628 has 12 divisors (see below), whose sum is σ = 117708192. Its totient is φ = 28025720.

The previous prime is 61656611. The next prime is 61656631. The reversal of 61656628 is 82665616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700600 + ... + 700687.

It is an arithmetic number, because the mean of its divisors is an integer number (9809016).

Almost surely, 2^61656628 is an apocalyptic number.

It is an amenable number.

61656628 is a deficient number, since it is larger than the sum of its proper divisors (56051564).

61656628 is a wasteful number, since it uses less digits than its factorization.

61656628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401302 (or 1401300 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 61656628 is about 7852.1734570754. The cubic root of 61656628 is about 395.0571471022.

The spelling of 61656628 in words is "sixty-one million, six hundred fifty-six thousand, six hundred twenty-eight".